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[PATCH] dm: extract device limit setting

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Separate the setting of device I/O limits from dm_get_device().  dm-loop will
use this.

Signed-off-by: Bryn Reeves <breeves@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Bryn Reeves 2006-10-03 01:15:42 -07:00 committed by Linus Torvalds
parent 9faf400f7e
commit 3cb4021453
2 changed files with 53 additions and 43 deletions
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21
drivers/md/dm-table.c
View file

@ -522,14 +522,9 @@ static int __table_get_device(struct dm_table *t, struct dm_target *ti,
return 0;
}
int dm_get_device(struct dm_target *ti, const char *path, sector_t start,
sector_t len, int mode, struct dm_dev **result)
void dm_set_device_limits(struct dm_target *ti, struct block_device *bdev)
{
int r = __table_get_device(ti->table, ti, path,
start, len, mode, result);
if (!r) {
request_queue_t *q = bdev_get_queue((*result)->bdev);
request_queue_t *q = bdev_get_queue(bdev);
struct io_restrictions *rs = &ti->limits;
/*
@ -571,7 +566,17 @@ int dm_get_device(struct dm_target *ti, const char *path, sector_t start,
q->seg_boundary_mask);
rs->no_cluster |= !test_bit(QUEUE_FLAG_CLUSTER, &q->queue_flags);
}
}
EXPORT_SYMBOL_GPL(dm_set_device_limits);
int dm_get_device(struct dm_target *ti, const char *path, sector_t start,
sector_t len, int mode, struct dm_dev **result)
{
int r = __table_get_device(ti->table, ti, path,
start, len, mode, result);
if (!r)
dm_set_device_limits(ti, (*result)->bdev);
return r;
}

5
include/linux/device-mapper.h
View file

@ -71,6 +71,11 @@ typedef int (*dm_ioctl_fn) (struct dm_target *ti, struct inode *inode,
void dm_error(const char *message);
/*
* Combine device limits.
*/
void dm_set_device_limits(struct dm_target *ti, struct block_device *bdev);
/*
* Constructors should call these functions to ensure destination devices
* are opened/closed correctly.